TY - JOUR
T1 - Broadband four elements pifa array for access-point mimo systems
AU - Fritz-Andrade, Erik
AU - Gómez-Villanueva, Ricardo
AU - Tirado-Méndez, José Alfredo
AU - Vasquez-Toledo, Luis Alberto
AU - Rangel-Merino, Arturo
AU - Jardón-Aguilar, Hildeberto
N1 - Publisher Copyright:
© 2020, Electromagnetics Academy. All rights reserved.
PY - 2020
Y1 - 2020
N2 - An antenna array formed by four PIFA elements located very close to each other, with low inter-element matching for MIMO applications is proposed. The antenna array consists of four F-inverted wideband radiators, with a fractional bandwidth around 56%, spaced one to each other by a very short distance (<0.065λ0) at a centre frequency of 2.55 GHz. The operational bandwidth goes from 1.88 to 3.15 GHz considering the Sii < −10 dB at each port. Moreover, the coupling among ports reaches values below Sij < −10 dB and getting values less than −30 dB at 1.8 GHz, just by employing an uncomplicated technique implemented by a neutralization line between elements. The antenna array gain goes from 2 dB to 6 dB over the operating bandwidth. Concerning MIMO figures of merit, the radiation pattern of each element is orthogonal to each other. The Envelope Correlation Coefficient is below 0.04 at the designed frequency, reaching a peak around 0.082 at 1.8 GHz, but still achieving the requirement for MIMO operation (less than 0.5). The Total Active Reflection Coefficient (TARC) is almost convergent at the design frequency, showing low dependence on random signals at different elements, and finally, the diversity gain reaches values close to 20 dB, making the array suitable for MIMO access point applications.
AB - An antenna array formed by four PIFA elements located very close to each other, with low inter-element matching for MIMO applications is proposed. The antenna array consists of four F-inverted wideband radiators, with a fractional bandwidth around 56%, spaced one to each other by a very short distance (<0.065λ0) at a centre frequency of 2.55 GHz. The operational bandwidth goes from 1.88 to 3.15 GHz considering the Sii < −10 dB at each port. Moreover, the coupling among ports reaches values below Sij < −10 dB and getting values less than −30 dB at 1.8 GHz, just by employing an uncomplicated technique implemented by a neutralization line between elements. The antenna array gain goes from 2 dB to 6 dB over the operating bandwidth. Concerning MIMO figures of merit, the radiation pattern of each element is orthogonal to each other. The Envelope Correlation Coefficient is below 0.04 at the designed frequency, reaching a peak around 0.082 at 1.8 GHz, but still achieving the requirement for MIMO operation (less than 0.5). The Total Active Reflection Coefficient (TARC) is almost convergent at the design frequency, showing low dependence on random signals at different elements, and finally, the diversity gain reaches values close to 20 dB, making the array suitable for MIMO access point applications.
UR - http://www.scopus.com/inward/record.url?scp=85095849505&partnerID=8YFLogxK
U2 - 10.2528/PIERC20081202
DO - 10.2528/PIERC20081202
M3 - Artículo
AN - SCOPUS:85095849505
SN - 1937-8718
VL - 106
SP - 163
EP - 176
JO - Progress In Electromagnetics Research C
JF - Progress In Electromagnetics Research C
ER -